CN204613302U - Multifunctional electric equipment test tester - Google Patents
Multifunctional electric equipment test tester Download PDFInfo
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- CN204613302U CN204613302U CN201520083684.6U CN201520083684U CN204613302U CN 204613302 U CN204613302 U CN 204613302U CN 201520083684 U CN201520083684 U CN 201520083684U CN 204613302 U CN204613302 U CN 204613302U
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Abstract
The utility model relates to a kind of multifunctional electric equipment test tester.Be characterized in: comprise isolation pressure regulator (GTB), the input winding two ends of this isolation pressure regulator (GTB) connect power supply by master switch, and the output winding of this isolation pressure regulator (GTB) is drawn respectively the first adjustable lead-out terminal and the second fixing lead-out terminal, thus export the isolation industrial frequency AC signal of 0-600V as test signal by this first lead-out terminal and the second lead-out terminal.Prove through using, tester of the present utility model can substitute original generator amature ac impedance measurement, ground screen resistance testing, the test of mutual inductor volt-ampere characteristic, and can realize the multi-purpose effect of a kind of instrument, and electrical test work apparatus is simplified, quantity is few, lightweight.
Description
Technical field
The utility model relates to a kind of multifunctional electric equipment test tester.
Background technology
Generator amature is the electrical equipment of a High Rotation Speed, be subject to electrocorrosion, temperature, humidity, electrodynamic effect and workmanship residual defects, be easy to shorted-turn fault occurs, AC impedance detects the most effective method of Short Circuit Between Generator Rotor Windings, original measuring method is measured many instrument and the occasional combination of measurement device, poor stability, wastes time and energy, and accuracy is low.In order to overcome such disadvantage, have developed " multifunctional electric equipment test tester ", power supply, instrument, protective device are combined by this instrument, achieve intelligent integral.
The reliability of substation grounding design not only affects the safety of the various electrical equipment of whole transformer station and normally runs, also be related to the personal safety of staff in station, therefore the security ensureing substation operation is wanted, key is that the grounding resistance of raising transformer station is the important technology index of system power ground, is one of important parameter weighing earthed system validity and security.Measurement accuracy grounding resistance, has the meaning of insignificant to grounded screen safety evaluatio, in order to ensure safety and the reliability service of transformer station, require that grounding resistance is low as far as possible.Particularly by height above sea level, earth's surface arid, the impact that underground water table is low, sources of environmental interference is many, brings larger difficulty to Measurement accuracy.This instrument can meet the test of any region geodetic network resistance, due to voltage continuously adjustabe, run into the earth mat test of High aititude, high soil rate, this instrument adjustable height trial voltage, running into the area that height above sea level is lower, soil moisture is large only needs small voltage just can complete the test of earth mat resistance.
Voltage transformer (VT), the current transformer of various electric pressure generally use in electric system; the volt-ampere characteristic test of mutual inductor is a mandatory pilot project; this instrument can easily realize this test; for Automation of Electric Systems device, relay protection and the metering of electric side provide reliable data, ensure that the safe and reliable long-term operation of electric system.
Utility model content
The purpose of this utility model is to provide a kind of multifunctional electric equipment test tester, electric power system power plant generator amature ac impedance measurement can be realized accurately and reliably, the test of generating plant and electric power system large ground network stake resistance and the volt-ampere characteristic test of all kinds of mutual inductor winding.
A kind of multifunctional electric equipment test tester, its special feature is: comprise isolation pressure regulator, the input winding two ends of this isolation pressure regulator connect power supply by master switch, and the output winding of this isolation pressure regulator is drawn respectively the first adjustable lead-out terminal and the second fixing lead-out terminal, thus export the isolation industrial frequency AC signal of 0-600V as test signal by this first lead-out terminal and the second lead-out terminal.
Wherein between master switch and the input winding of isolation pressure regulator, be also provided with the self-locking switch circuit be made up of relay and pushbutton switch.
Between the second lead-out terminal and the output winding of isolated voltage regulating device, be wherein in series with the coil of current relay, the contact that exports for a pair of this current relay is connected in described self-locking switch circuit, thus can be made the input winding side power-off of isolated voltage regulating device by self-locking switch circuit when excess current.
Wherein also comprise the time relay, this time relay connect with switch after together be connected in parallel in described self-locking switch circuit, and a pair of this time relay export contact be connected in described self-locking switch circuit.
Wherein be in series with reometer on the first lead-out terminal side, thus the size of display translation end current value; Also comprise at least one voltage table.
Many discrete components and meter meter gather together by tester of the present utility model, realize intelligent, fast and safely accurately can complete test job, can greatly improve generator amature ac impedance measurement efficiency.The reliability of substation grounding design not only affects the safety of the various electrical equipment of whole transformer station and normally runs, and tester of the present utility model can meet the test of any region geodetic network resistance.Mutual inductor volt-ampere characteristic and no-load voltage ratio test are the accuracys being related to relay protection and measurement, and tester of the present utility model accurately can complete this two experimental test work.Electrical equipment carry out industrial frequency AC withstand voltage time all to use Regulation Control control box, this testing tool can as voltage 0--300V, and the completely isolated formula regulated power supply of power 0--10kVA uses.
Prove through using, tester of the present utility model can substitute original generator amature ac impedance measurement, ground screen resistance testing, the test of mutual inductor volt-ampere characteristic, and can realize the multi-purpose effect of a kind of instrument, and electrical test work apparatus is simplified, quantity is few, lightweight.Tester of the present utility model can meet the test of any region geodetic network resistance, due to voltage continuously adjustabe, run into the earth mat test of High aititude, high soil rate, this instrument adjustable height trial voltage, running into the area that height above sea level is lower, soil moisture is large only needs small voltage just can complete the test of earth mat resistance.Because the voltage transformer (VT) of various electric pressure, current transformer generally use in electric system; the volt-ampere characteristic test of mutual inductor is a mandatory pilot project; adopt instrument of the present utility model can easily realize this test; for Automation of Electric Systems device, relay protection and electrical measurement metering provide reliable data, ensure that the safe and reliable long-term operation of electric system.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, the utility model is a kind of multifunctional electric equipment test tester, comprise isolation pressure regulator GTB, the input winding two ends of this isolation pressure regulator GTB connect power supply by master switch, and the output winding of this isolation pressure regulator GTB is drawn respectively the first adjustable lead-out terminal and the second fixing lead-out terminal, thus export the isolation industrial frequency AC signal of 0-600V as test signal by this first lead-out terminal and the second lead-out terminal.
Wherein between master switch and the input winding of isolation pressure regulator GTB, be also provided with the self-locking switch circuit (the conventional latching circuit that the coil of the relay C namely in Fig. 1 and two normally closed interlocks, button HN, button TN form) be made up of relay and pushbutton switch.Wherein connect between the second lead-out terminal and the output winding of isolated voltage regulating device GTB (being directly connected) have the coil of current relay IJ, the contact that exports for a pair of this current relay IJ is connected in described self-locking switch circuit, thus can be made the input winding side power-off of isolated voltage regulating device by self-locking switch circuit when excess current.Wherein also comprise time relay sj, this time relay sj connect with switch after together be connected in parallel in described self-locking switch circuit, and a pair of this time relay sj export contact be connected in described self-locking switch circuit.Wherein reometer is connected on and exchanges in output loop, for the size of display translation end current value, the wiring of voltage table internal independence, by connecing lead-out terminal with test wire, for the size of surveying instrument output voltage values, or and connect tested arrangement terminal, as voltage measurement table meter use, voltage table is dual-purpose flexibly.
Using method of the present utility model and principle of work are:
As shown in Figure 1, this multifunctional electric equipment test tester, when carrying out generator amature AC impedance, received respectively on generator amature two collector rings by instrument two lead-out terminals, voltage measuring instrument terminal is attempted by instrument and exports on two terminals, close instrument start button, regulate pressure regulator knob, slowly the required pressurization value of boosting, more slowly by voltage is adjusted to zero after recording the voltage of instrument, current value simultaneously, presses trip button.Wherein travel switch plays protective separation formula pressure regulator GTB effect; isolated voltage regulating device GTB travel switch normally closed contact is serially connected in self-locking switch circuit; when travel switch is not in " 0 " position; normally closed contact can not close; just can not arbitrarily close start button, prevents exporting large voltage instantaneously and damage tested device.Between the second lead-out terminal and the output winding of isolated voltage regulating device GTB, be wherein in series with the coil of current relay IJ, the contact that exports for a pair of this current relay IJ is connected in described self-locking switch circuit, at the trial, when tested device exists fault, in the process of boosting, electric current increases instantaneously, after current relay IJ detection of excessive current value, the normally closed contact of connecting in self-locking switch circuit is opened, thus the input winding side power-off of isolated voltage regulating device can be made by self-locking switch circuit when excess current, protection instrument is not shorted circuit damage, prevent continuing to execute high voltage and damage tested device.Wherein also bag time relay sj; this time relay sj is connected in described self-locking switch circuit together with after switch in parallel; and a pair output contact of this time relay sj is connected in described self-locking switch circuit; time relay sj arranges the set time; when in process of the test; apply large voltage time unsuitable long; require to complete test rapidly; prevent testing crew from neglecting; after the given 5S time delay of time relay sj; made the input winding side power-off of isolated voltage regulating device by self-locking switch circuit, play the effect of protection test instrument and tested device.
1. generator amature is the electrical equipment of a High Rotation Speed, be subject to electrocorrosion, temperature, humidity, electrodynamic effect and workmanship residual defects, be easy to shorted-turn fault occurs, AC impedance detects the most effective method of Short Circuit Between Generator Rotor Windings, and original measuring method is measured at combination when many instrument and measurement device zero.Our instrument of research and development is gathered together at many discrete components and meter meter, realizes intelligent, fast and safely accurately can complete test job.
The using method of the utility model tester: when carrying out generator amature AC impedance, instrument two lead-out terminals are received respectively on generator amature two collector rings, voltage measuring instrument terminal being attempted by instrument exports on two terminals, close instrument start button, regulate pressure regulator knob, the slowly required pressurization value of boosting, record the voltage of instrument simultaneously, slowly voltage is adjusted to zero again after current value, press trip button, compare with all previous data according to measured value, judge whether generator amature winding there occurs turn-to-turn short circuit with this, for the safe operation of generator long period provides reliable basis, this instrument improves generator amature ac impedance measurement efficiency greatly.
2. the reliability of substation grounding design not only affects the safety of the various electrical equipment of whole transformer station and normally runs, also be related to the personal safety of staff in station, therefore the security ensureing substation operation is wanted, key is that the grounding resistance of raising transformer station is the important technology index of system power ground, is one of important parameter weighing earthed system validity and security.Measurement accuracy grounding resistance, has the meaning of insignificant to grounded screen safety evaluatio, in order to ensure safety and the reliability service of transformer station, require that grounding resistance is low as far as possible.Particularly by height above sea level, earth's surface arid, the impact that underground water table is low, sources of environmental interference is many, brings larger difficulty to Measurement accuracy.
The using method of the utility model tester: when carrying out sending out power supply transformer station's geodetic network's experimental test, instrument being exported two terminal one ends is connected on by ground, side online, another terminal is connected on the electric current pole (stake) of temporary laid when earth mat is tested, voltage measuring instrument terminal one end is connected on tested ground online, when another terminal is connected on measurement temporary laid voltage pole (stake) on, close instrument start button, regulate pressure regulator knob, the slowly required current value of liter, record the voltage of instrument simultaneously, slowly voltage is adjusted to zero again after current value, press trip button, magnitude of voltage according to measuring just has drawn the grounding resistance of earth mat with the ratio of current value.Judge that whether earth mat resistance is qualified with this, for the long period safe operation of electrical network provides reliable basis.Because this instrument current continuity is adjustable, power is large, is suitable for the test of any region electric substation earth mat.
3. mutual inductor volt-ampere characteristic and no-load voltage ratio test are the accuracys being related to relay protection and measurement, and this instrument accurately can complete this two experimental test work.
The using method of the utility model tester: when carrying out the test of mutual inductor volt-ampere characteristic test, instrument being exported two terminals receives in tested mutual inductor Secondary Winding respectively, voltage measuring instrument terminal is attempted by output two terminals of instrument, close instrument start button, regulate pressure regulator knob, the slowly required pressurization value of boosting, record the voltage of instrument simultaneously, slowly voltage is adjusted to zero again after current value, press trip button, voltage is drawn out according to measured value, the function curve of electric current, the excitation property of mutual inductor is determined with this, foundation is provided to the configuration of electric relay protection and automation equipment.
4. electrical equipment carry out industrial frequency AC withstand voltage time all to use Regulation Control control box, the utility model tester can as voltage 0--300V, and the completely isolated formula regulated power supply of power 0--10kVA uses.
Claims (5)
1. a multifunctional electric equipment test tester, it is characterized in that: comprise isolation pressure regulator (GTB), the input winding two ends of this isolation pressure regulator (GTB) connect power supply by master switch, and the output winding of this isolation pressure regulator (GTB) is drawn respectively the first adjustable lead-out terminal and the second fixing lead-out terminal, thus export the isolation industrial frequency AC signal of 0-600V as test signal by this first lead-out terminal and the second lead-out terminal.
2. multifunctional electric equipment test tester as claimed in claim 1, is characterized in that: wherein between master switch and the input winding of isolation pressure regulator (GTB), be also provided with the self-locking switch circuit be made up of relay and pushbutton switch.
3. multifunctional electric equipment test tester as claimed in claim 2, it is characterized in that: the coil being wherein in series with current relay (IJ) between the second lead-out terminal and the output winding of isolated voltage regulating device (GTB), the contact that exports for a pair of this current relay (IJ) is connected in described self-locking switch circuit, thus can be made the input winding side power-off of isolated voltage regulating device by self-locking switch circuit when excess current.
4. multifunctional electric equipment test tester as claimed in claim 2, it is characterized in that: wherein also comprise the time relay (SJ), this time relay (SJ) connect with switch after together be connected in parallel in described self-locking switch circuit, and a pair of this time relay (SJ) export contact be connected in described self-locking switch circuit.
5. multifunctional electric equipment test tester as claimed in claim 1, is characterized in that: be wherein in series with reometer on the first lead-out terminal side, thus the size of display translation end current value; Also comprise at least one voltage table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520083684.6U CN204613302U (en) | 2015-02-06 | 2015-02-06 | Multifunctional electric equipment test tester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520083684.6U CN204613302U (en) | 2015-02-06 | 2015-02-06 | Multifunctional electric equipment test tester |
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| CN204613302U true CN204613302U (en) | 2015-09-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698280A (en) * | 2015-02-06 | 2015-06-10 | 国电科学技术研究院银川电力技术分院 | Multi-functional test instrument for electrical equipment experiments |
| CN109580994A (en) * | 2018-11-27 | 2019-04-05 | 国家电网有限公司 | A kind of test wire jointer with voltage monitored and assist storage function |
-
2015
- 2015-02-06 CN CN201520083684.6U patent/CN204613302U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698280A (en) * | 2015-02-06 | 2015-06-10 | 国电科学技术研究院银川电力技术分院 | Multi-functional test instrument for electrical equipment experiments |
| CN109580994A (en) * | 2018-11-27 | 2019-04-05 | 国家电网有限公司 | A kind of test wire jointer with voltage monitored and assist storage function |
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